Linkdown: 8/14/13

It turns out that burning organic fuels like wood, charcoal or gas produces a variety of chemicals, including trace amounts of nitrogen dioxide (NO2) gas. When NO2 gas meets the surface, it dissolves into the meat and picks up a hydrogen molecule, becoming nitrous acid (HNO2), which then gets converted into nitric oxide (NO). NO reacts with myoglobin, and together they form a stable pink molecule that can withstand heat. The thickness of the ring depends on how deep into the meat the NO is able to penetrate before reacting with myoglobin.